Multiple Super Weird Failure Modes
Posted: Thu Feb 21, 2019 8:04 pm
I started getting filament sticking in the throat of the hot end during setup. This is a single extruder V4 24 volt M2 that's run several hundred kg of ABS and PLA through four different nozzles on two different hot ends. It's got a number of mechanical mods to make it more robust -- a miniature I-beam under the longer rail bracket, a redesigned extruder motor mount, aftermarket fans -- but no electrical or code mods. Just wouldn't extrude. I noticed that the temperature of the hot end was drifting down. I'm using S3D, so I manually set Extruder temp again to 245, and it seemed to come back up... but then the downward drift would start again and filament started to bind, the drive gear chewing a little crescent out of the filament.
The hot end had a lot of hours on it, and the nozzle was pretty worn from cleanings and use. I installed a spare. On reboot and starting up S3D, I couldn't get a good connection. Rebooted Win10 PC and M2. Restarted S3D 4.1.1. Connected manually -- under Win10 I notice it never automatically connects, which seemed to be the rule under the old Win7 installation. Wanted to adjust the gap first so I started heating the build plate to 100. Temp ran up to 54 degrees, and then the extruder temp readout zeroed from ambient and the platform temp started falling. Set it to 100 again. Climbed to 65... and then started falling back towards ambient.
Restarted M2 and S3D. Got a good connect. Ran autotune M303. Autotune seemed to complete OK, quick, and I saved the loop constants via M500. Set platform temp to 100. Platform temp climbed to 40... and then started to fall back to ambient. Tried again... climbed to 60 and then started falling back.
Tried some platform jog commands -- not the extrude + or - because extruder temp was too low to allow extrude motion .... and S3D echoed "Printer stopped deu to error. Use M999 to reset and then reset temperature."
Issued M999. Platform heater indicated still ON. Rebooted M2 and S3D. Got a good connect. Issued command to heat platform. Issued command to heat extruder. Extruder heated to 180 and then started falling back to ambient. Platform heated to 70 and then started falling back to ambient. Re-issued both temperature demands, and both platform and extruder started to climb back to demanded temps.
Got plate and extruder heated to 100 and 245 respectively. Fed new ABS filament of a type we use all the time. Feed acts weird, comes out in fits and spurts like it's sticking. Seems like the nozzle just isn't hot enough, but it shows 245. Then... "Printer stopped deu to error. Use M999..."
Rebooted S3D and M2. Seems to be working OK now. Platform holds temp. Can extrude manually and seems like I'm getting good melt and feed.
Ambient is constant -- commercial facility. We have five M2s... been running them for years. Never saw anything like this before. What happened? And can I trust the machine to start some bigger printers?
The hot end had a lot of hours on it, and the nozzle was pretty worn from cleanings and use. I installed a spare. On reboot and starting up S3D, I couldn't get a good connection. Rebooted Win10 PC and M2. Restarted S3D 4.1.1. Connected manually -- under Win10 I notice it never automatically connects, which seemed to be the rule under the old Win7 installation. Wanted to adjust the gap first so I started heating the build plate to 100. Temp ran up to 54 degrees, and then the extruder temp readout zeroed from ambient and the platform temp started falling. Set it to 100 again. Climbed to 65... and then started falling back towards ambient.
Restarted M2 and S3D. Got a good connect. Ran autotune M303. Autotune seemed to complete OK, quick, and I saved the loop constants via M500. Set platform temp to 100. Platform temp climbed to 40... and then started to fall back to ambient. Tried again... climbed to 60 and then started falling back.
Tried some platform jog commands -- not the extrude + or - because extruder temp was too low to allow extrude motion .... and S3D echoed "Printer stopped deu to error. Use M999 to reset and then reset temperature."
Issued M999. Platform heater indicated still ON. Rebooted M2 and S3D. Got a good connect. Issued command to heat platform. Issued command to heat extruder. Extruder heated to 180 and then started falling back to ambient. Platform heated to 70 and then started falling back to ambient. Re-issued both temperature demands, and both platform and extruder started to climb back to demanded temps.
Got plate and extruder heated to 100 and 245 respectively. Fed new ABS filament of a type we use all the time. Feed acts weird, comes out in fits and spurts like it's sticking. Seems like the nozzle just isn't hot enough, but it shows 245. Then... "Printer stopped deu to error. Use M999..."
Rebooted S3D and M2. Seems to be working OK now. Platform holds temp. Can extrude manually and seems like I'm getting good melt and feed.
Ambient is constant -- commercial facility. We have five M2s... been running them for years. Never saw anything like this before. What happened? And can I trust the machine to start some bigger printers?